Al Qaeda Chief Urges Lone Attacks to Bleed US Dry

Ayman al-Zawahiri, Osama bin Laden's replacement as the Head of Al Qaeda, has called for more attacks similar to the bombing of the Boston Marathon that he said would 'bleed America' into expending crippling security costs.
The incitement to commit further terrorist attacks came in the form of an audio message marking the 12th anniversary of the 11th September 2001 attacks.
"We must bleed America economically by provoking it, so that it continues its massive expenditures on security.